Negima!? Neo, Volume 4 — Ken Akamatsu

HERE COMES TROUBLE!
 
Negi Springfield is a true prodigy: not only is he a teacher at age ten, he's also a powerful magician! Negi's in charge of a bevy of beautiful girl students, which is a challenge even for a wizard. But Negi's job gets even harder when his childhood friend Anya joins his class. Anya's having a tough time fitting in with the other students -- and an even tougher time accepting Negi as her teacher!
 
Based on the Negima! anime, this is a fresh take on the beloved Negima! story!